.border-card {
    border-top: 5px solid #003993;
}

#btnScrollTop {
    position: fixed;
    bottom: 20px;
    right: 20px;
    display: none;
    /* oculto al inicio */
    border-radius: 50%;
    padding: 10px 15px;
    font-size: 20px;
    z-index: 999;
}

.font-sans {
    font-family: ui-sans-serif, system-ui, sans-serif;
}

.antialiased {
    -webkit-font-smoothing: antialiased;
    -moz-osx-font-smoothing: grayscale;
}

.tabs-upn .tab-btn {
    background: #e5e7eb;
    border: none;
    padding: 10px 20px;
    margin: 5px;
    border-radius: 8px;
    font-weight: 600;
    cursor: pointer;
}

.tabs-upn .active {
    background: #061b3a;
    color: #fff;
}

/* contenido */
.tab-content {
    display: none;
}

.tab-content.active {
    display: block;
}

/* cards */
.video-card {
    position: relative;
    border-radius: 10px;
    overflow: hidden;
}

.video-card img {
    width: 100%;
    height: 260px;
    object-fit: cover;
}

/* botón play */
.play-btn {
    position: absolute;
    top: 50%;
    left: 50%;
    transform: translate(-50%, -50%);

    background: white;
    width: 60px;
    height: 60px;
    border-radius: 50%;

    display: flex;
    align-items: center;
    justify-content: center;

    font-size: 20px;
    color: #f59e0b;
    text-decoration: none;
}

/* título debajo */
.video-title {
    text-align: center;
    font-weight: 600;
    margin-top: 10px;
}

.hero-section {
    position: relative;
    height: 350px;
    background: url('https://www.athento.com/wp-content/uploads/2023/07/La-Importancia-de-Implementar-un-Sistema-de-Gestion-Documental.png') center/cover no-repeat;
    display: flex;
    align-items: center;
    justify-content: center;
    overflow: hidden;
}

/* capa oscura */
.hero-overlay {
    position: absolute;
    width: 100%;
    height: 100%;
    background: linear-gradient(rgba(0, 0, 0, 0.4),
            rgba(0, 0, 0, 0.6));
}

/* contenido */
.hero-content {
    position: relative;
    text-align: center;
    color: white;
}

.hero-content h1 {
    font-size: 40px;
    font-weight: 800;
    letter-spacing: 2px;
    text-transform: uppercase;
    color: white;
}

.hero-content p {
    font-size: 16px;
    margin-top: 10px;
}

.card-sistema {
    background: #fff;
    border-radius: 12px;
    padding: 20px;
    text-align: center;
    box-shadow: 0 5px 20px rgba(0, 0, 0, 0.08);
    transition: 0.3s;
    height: 100%;
}

.card-sistema:hover {
    transform: translateY(-5px);
}

.card-sistema h5 {
    color: #082656;
    font-weight: bold;
}

.card-sistema p {
    font-size: 14px;
    margin: 10px 0;
}

.btn-sistema {
    display: inline-block;
    margin-top: 10px;
    padding: 8px 15px;
    background: #082656;
    color: #fff;
    border-radius: 20px;
    text-decoration: none;
    font-size: 13px;
}

.btn-sistema:hover {
    background: #0b3a8f;
}




.card-paso {
    background: #fff;
    border-radius: 12px;
    padding: 25px;
    text-align: center;
    box-shadow: 0 5px 20px rgba(0,0,0,0.08);
    position: relative;
    transition: 0.3s;
}

.card-paso:hover {
    transform: translateY(-5px);
}

.badge-paso {
    position: absolute;
    top: -10px;
    left: 50%;
    transform: translateX(-50%);
    background: #f59e0b;
    color: white;
    padding: 5px 12px;
    border-radius: 20px;
    font-size: 12px;
}

.card-paso h5 {
    color: #082656;
    margin-top: 10px;
}

.btn-descarga {
    background: #082656;
    color: white;
    padding: 6px 14px;
    border-radius: 20px;
    text-decoration: none;
    font-size: 13px;
    margin-right: 5px;
}

.btn-manual {
    background: #e5e7eb;
    color: #000;
    padding: 6px 14px;
    border-radius: 20px;
    text-decoration: none;
    font-size: 13px;
}